TW200946081A - Biometrics authentication device - Google Patents

Abstract

Provided is a biometrics authentication device capable of performing a highly accurate authentication with a simple structure. The biometrics authentication device comprises a plurality of infrared LED arrays provided on the inner wall surface of a chassis and illuminating from directions different from one another, a mirror for reflecting a part or all of a transmitted-light image, a CCD imaging element for simultaneously imaging the transmitted-light image and/or a reflection image of the transmitted-light image created by the mirror, a matching means for performing a matching process between the transmitted-light image imaged by the CCD imaging element and a registered image and extracting an image having the highest matching rate, and a means for deciding, based on the matching rate, whether to authenticate or not. With a simple structure, a blood vessel image can be captured by the transmitted light from a plurality of directions.

Description

[Technical Field] The present invention relates to a biometric authentication device based on biometric information, and particularly relates to a biometric authentication device for authenticating an individual based on a blood vessel type of a finger. [Prior Art] In the past, it has been proposed to authenticate an individual's biometric authentication device based on the blood vessel type of the hand or finger. In the following patent documents, the personal authentication device of the blood vessel type which is claimed by the applicant in the non-contact photographing hand or finger is disclosed. The personal authentication device includes: a space having an insertion finger; a plurality of LED (Light Emitting Diode) arrays disposed on an inner wall surface of the housing; and a plurality of line sensors disposed on the LED and the LED The opposite inner wall of the array. And 'detecting the nail position of the inserted finger from the captured image and determining the position of the fingertip from the nail position, and then cutting out the infrared transmitted light image of the fingertip portion from the captured image, and the pre-registered image Compare. [Patent Document 1] JP-A No. 20 05-071317 [Summary of the Invention] [Problems to be Solved by the Invention] In the past, a conventional biometric authentication device having the device construction weight "difference in accuracy" has been created. Complex, the problem of the load of the image processing and the processing required for the knife. The object of the present invention is to solve the above

2I59-10070-PF 200946081 The object of providing a body authentication device in a simple configuration. Ding-accuracy-recognizing organisms [Means for Solving the Problem] 主要 The main features of the biometric authentication device of the present invention include: a child body having an internal space in which a finger is inserted; a plurality of light source hands & a plurality of inner wall surfaces of the composite body, and each of the plurality of inner wall surfaces is illuminated along the finger, and the reflecting means is disposed or embedded in the inner casing of the insertion finger and opposed to the casing of the light source means The inner wall surface and the light image is reflected; the photographic means 'photographs the simultaneous transmitted light image and the transmitted light image reflected by the reflection means; the photographic control means detects the insertion of the finger and controls the light source The means and the photographing section are photographed; the comparing means 'aligns the image taken by the photographing means with the pre-registered image, and extracts the image with the best agreement rate; and the determining means is based on The authentication rate is determined by the consistency ratio of the images extracted by the comparison means. Further, the biometric authentication device is characterized in that the reflection means is a plane mirror or a flaw. Moreover, the main feature of the biometric authentication device of the present invention includes: a housing having an internal space in which the finger is inserted; and a plurality of light source means disposed or embedded in a plurality of internal wall surfaces of the housing, and along the respective fingers Illuminating from a plurality of directions; the concave reflecting means is constituted by a concave mirror which is slanted or embedded in the inner wall surface of the casing opposite to the light source means via the inner space of the insertion finger, and transmits the light image Reflection; photography means 'shooting the transmitted light image reflected by the concave reflection means; photography

2159-10070-PF 6 200946081 The control means detects the insertion of the finger and controls the light source hand and the _ shadow means to shoot; the comparison means, the change is based on the dream image taken by the photography means, Compare with the pre-registered images, and extract the image that is better than the best image; and the means of judgment, the transmission of the Iraqi (4)* and the rate of the most stupid m & The consistency rate determines the feasibility of the certification. Further, the biometric authentication device is characterized in that the concave mirror cuts out a shape of a part of a side surface of a cylindrical or conical shape (4)

Belly: The face is opposite to the 'and is placed closer to the fingertip and the farther away from the face of the concave mirror is the position of the J heart. Further, the photographing means is disposed in front of the finger, and the position is slightly downward. This point is also characteristic. Further, the biometric authentication device is characterized in that the photographing control means causes the plurality of light source means to light up one by one and each of the transmitted light images; and X includes image synthesizing means for transmitting from the respective photographs. The light image cuts out a predetermined area and sticks to each other to form an image. Further, the biometric authentication device is characterized in that the concave portion or the notch of the left and right fingers for placing the finger used for the identification is placed on the upper surface of the housing and the inner space of the finger used for the insertion identification is used. Slanted upwards. [Effects of the Invention] According to the configuration of the present invention, a simple structure is obtained, and non-contact can obtain transmitted light, reflected light, or both blood vessel images from a plurality of directions, and by comparing the obtained plurality of images. For processing, it has the effect of being able to recognize with high precision. Moreover, it is also possible to simultaneously capture the transmission of a plurality of directions by one photographing means. 2159-10070-PF 7 200946081 Optical imagery The construction or processing of the apparatus is simple. Further, in this case, each of the directions is photographed, and the images are synthesized later, whereby a more vivid image can be obtained. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First embodiment

Fig. 2 is a block diagram showing the overall structure of a system in which the biometric authentication device 1 is used for room management. The biometric authentication device i is connected to the electromagnetic locking device 11 of the door, and when the authentication device 10 detects the person (image registrant) who is permitted to enter the room, the unlocking signal is reached from the authentication device 10 to the electromagnetic locking device 11. Further, the authentication result is transmitted from the biometric authentication device 10 to the personal computer 12 every time the authentication process is performed, and the personal computer 12 displays/saves the entry record. Fig. 1 is a cross-sectional view showing the structure of a main portion of a second embodiment of the biometric authentication device of the present invention. The blood tube imaging unit of the biometric authentication device 1 refers to a recess in which the housing 30 is inserted into the internal space of the finger. Fig. 1 is a cross-sectional view of the upper portion of the casing 3, and the lower portion is a longitudinal sectional view. The authenticated person inserts the finger 20 into the concave portion of the casing 3 of the biometric authentication device. The LED arrays 35 to 37 of the light source means are disposed on the inner side and the inner side of the basket body 30, and the CCD photographs iT W to 3 3 of the photographing means are disposed on the inner side surface and the inner bottom portion. The LED arrays 35 to 37 are, for example, arranged in a plurality of infrared lines along a finger. Each LED array 35~3, 'w楫 each

2159-10070-PF 8 200946081 Independent, and can be controlled by ΟΝ/OFF. The CCD imaging elements 31 to 33 are well-known CCD two-dimensional photo sensors capable of capturing still images in the infrared region. An optical system such as a lens is attached to the front of the c(3) sensor. Further, as the two-dimensional photosensor, as long as it is sensitive to infrared rays, any two-dimensional photosensor other than a CCD sensor such as a CMOS sensor can be used. ❹ Ο βπ door 泜 Shao. The inner electrode 38 is used to contact the front end portion of the inserted finger, and the front side electrode 39 is used to refer to the electrode in contact near the root. The authenticated person detects the insertion of the finger by bringing the finger into contact with both of the electrodes, and determines the biological body based on the current value flowing between the two electrodes 38 and 39, for example. Fig. 3 is a block diagram showing the electrical function of the biometric authentication device of the present invention. The single crystal computer circuit (10) is a well-known LSI including a coffee maker, a read/write interface, and an input interface circuit, and can be used to obtain

^ Any single crystal computer of the program of the function of the present invention. Do not wave L hidden body 58 series single crystal computer circuit 5 〇 can be read and written, such as flash memory 荨, volatile RAM, used to remember the registered blood vessel image. Single crystal computer circuit 5 〇 can be thin by the brewing cry c

The lighting/off of the array... and the LED of the 意 means that the macro cylinder is very close and cumbersome. In addition, the early crystal computer circuit 50 can be CCD camera 3, 33 吝τ ® Beiyang ▼ do not t唬. The output signal which is rotated from the CCD imaging device 3b 33 via 40 is selected by the class 51, and the image is converted by the (10) camera circuit 耔Λ/λ m and then the A/D converter 52 is used to be converted into a single crystal. The computer circuit 50 reads in. The inner electrode 38 is also wheeled into the class 2159-ΐ〇〇7〇^ρρ 9 200946081 by the DC amplifier. The DC power supply Thunder, and the electrode 39' applied to the front side by the resistor generates a voltage at the inner electrode 38 in response to the resistance value of the finger by touching the two electrodes of the two electrodes. . The left-hand visit 旷v is considered as an inserted finger in the case where the predetermined range of the voltage system is predetermined. In the panel 55, a display device for inputting a numeric key such as a fee code number or the like, or a state of the switch and the display device required for the registration processing or the authentication result is set. The communication interface circuit 56 is borrowed by a personal computer such as an RS-232C standard or USB, LM, etc.; w ία

The quasi-interface circuit is used, and the single crystal computer circuit 50 rotates the authentication result and the authentication processing information of the authenticator (4) to the personal computer 1G via the circuit. The unlocking drive electric & 57 outputs, for example, a signal for driving the unlocking solenoid valve of the electromagnetic locking device 11. Fig. 4 is a flow chart showing the inner valley of the processing performed by the single crystal computer circuit 5 in accordance with the built-in program. Further, the biometric authentication device (7) uses A » has been processed to register the blood vessel image captured in each direction from the registrant and memorizes it in the non-volatile memory 58. At S10, it is determined whether or not the finger is detected, and if the result of the determination is negative, the process returns to S10, and in the affirmative case, to S1i. The single crystal computer circuit (10) periodically A/D converts the voltage of the electrode 38 and reads it, and in the case where the voltage system is within a predetermined range, it is regarded as a finger inserted into the living organism. The upper LED array 35 is turned on at S11', and the bottom CCD camera 3 is selected to capture the lower transmitted light image of the blood vessel. At si2, the left LED array 37 is turned "on" and the right side CCD imaging element 33 is selected to capture the right transmitted light image. At Si 3, the right LED array 36 is turned on, and the left side CCD imaging element 32 is selected to take a left transmitted light image.

2159-10070-PF 10 200946081 In S14, the well-known J J comparison process is performed on the image of the light photographed by the π 、, the head 狛, and the image is recorded through the light, and the highest agreement rate is obtained. Registration image. At S15, the right transmitted light image taken at the S1 mailing address s12 and the right right transmitted light registered image are subjected to the _ 匕 匕 pair processing, and the registered image with the highest coincidence rate is extracted. In S1 6, the image of the left transmitted light image taken by the η ς η η 仏 在 在 S S S S S S S S S S S S S S 。 。 。 。 。 。 。 。 。 。 。 。 。 左 左 左 左 左 左In S17, among the three images extracted in S14 to S16, for example, a registered image of a predetermined number of sheets of two sheets is selected. At si8, it is determined whether or not the registrants of the two images selected in S17 are both above and above the predetermined threshold. In S19, if the result of the determination is negative, the process moves to S2, and in the case of affirmative, it moves to S2. At S20, the authentication result is set to 〇κ (pass). Also, Μ!, set the authentication result to NG (failed). At S22, the authentication result is displayed on the panel 55:, and the authentication result information is transmitted to the personal computer via the communication interface circuit 56. The unlocking drive circuit 57 is controlled to perform the unlocking process in the case where the result is οκ in S23 '. With the construction and processing shown above, the spear i can capture the blood vessel image in a non-contact manner and perform high-accuracy authentication. (Second embodiment) Fig. 5 is a cross-sectional view showing the structure of a second embodiment of the biometric authentication device of the present invention. Fig. 5(a) shows an embodiment in which an infrared image of a blood vessel is taken by reflected light. Although the configuration of the right and left side faces is the same as that of the first embodiment, the LED array 6 is disposed on the bottom surface. Figure 5(b)

2159-10070-PF 11 200946081 An embodiment of a double image of transmitted and reflected light can be taken, using a semi-anti-image embodiment. In 苐5(b), Α + mirrors 76 to 78, the illumination is aligned with the optical axis of the ED ρ train and the optical axis of the CCD imaging element. Single column

By separately selecting the LED array for illumination and (10) the photographic element, the structure of the figure or the structure of Fig. 5(a) is from the side, and the picture of the illuminating light and the reflected light can be simultaneously taken from the bottom surface. The images of both sides. Therefore, it is also possible to create five kinds of images in the structure of the i-th diagram or the structure of the fifth (a) and six kinds of images for the fifth (8), and to compare all of the images of each of the images. The registration image of the predetermined number of sheets (any number of one or more) of the upper order is determined and determined. (THIRD EMBODIMENT) Fig. 6 is a cross-sectional view showing the structure of a third embodiment of the biometric authentication device of the present invention. Although the structure of the light source which is added to the left and right and above is the same as that of the first embodiment, the right illuminating light image and the left side can be taken by the CCD photographic element 82. The optical image is formed by arranging the two mirrors 80 and 81 in the photographic angle of view of the CCD imaging device 82, and the CCD imaging device 82 can simultaneously capture the transmitted light image, the right transmitted light, and the left image. An example of traversing the three parts of the pupil plane. (b) An example of a photographic image 'synthesizes one side of the side transmitted light image 86, 87 and the lower transmitted light image 85. The biometric authentication apparatus of the third embodiment can In addition, the imaging time is shortened, and the biometric authentication device can be configured by one expensive CCD imaging element. In the third embodiment, an example of combining the transmitted light images from the three directions is disclosed. However, the mirror 2159-10070-PF 12 200946081 can also be used to reflect one of the transmitted light images from the two directions and simultaneously photographed with the other transmitted light image. The fourth embodiment shows the raw Liu Yongyou of the present invention. m exhibition A cross-sectional view showing the structure of the fourth embodiment. In the fourth embodiment, the mirror (planar mirror) of the third embodiment is replaced with a ridge. The 稜鏡(10) and 91 are, for example, rod-shaped in the shape of an isosceles triangle. The light incident on the short side of one side of the isosceles triangle is totally reflected by the long side surface and then outputted from the other short side surface. As in the second embodiment, the "solid photographic element can be photographed from 3 directions of image. Fig. 9 is a flow chart showing an embodiment of the processing performed by the single crystal computer circuit 5A. The processing shown in Fig. 9 can be applied to the Wth embodiment. If the cut-out position of the image in each direction is predetermined, the fifth embodiment of the above: 2 =:= can also be applied. In addition, the blood card device 10 photographed in each direction of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _35 36, 37 all lighting 'the second photography shooting... : Yes: When the LED array 3 direction is lit at the same time, the transmitted light image is more unclear than the If π of the spotlight. Therefore, in this process, the images of 3 directions are captured, and the images in the respective directions are combined, and = 1 image is then subjected to the comparison processing. In S30, the initialization is performed, and the result of the determination is negative, and the process proceeds to S32. The single crystal computer circuit 50 is moved, and it is determined at S31' whether or not the finger is detected. Returning to S31', the voltage of the electrode 38 is periodically increased in a positive case.

2159-10070-PF 13 200946081 A/D converts and reads in the case of a predetermined voltage range predetermined by the voltage system' as an indicator of the inserted organism. At S32, only the upper LED array 35 is turned on, and the CCD imaging element 82 is used to capture the lower transmitted light image of the finger vessel. At S33, only the left array 37 is lit, and the right transmitted light image is taken. At S34, only the right lED array 36 is lit and a left transmitted light image is taken. Further, as the captured image, as shown in Fig. 6(b), each of the images includes three directions.

At S35, the lower, right, and left transmitted light images are combined. The synthesizing method is, for example, an effective area of each image shown in Fig. 6(b), for example, a central region 85 is cut out by transmitting a light image, and the cut images are pasted to form one image. The processing load is light because only the defined area is cut and then adhered. At S36, a well-known comparison process is performed on the synthesized transmitted light image and the registered image, and the registered image having the highest coincidence rate is extracted. It is judged at S37' whether or not the coincidence rate is equal to or greater than a predetermined threshold. In the case where the judgment result is negative, the process moves to S40, and in the affirmative situation S38, the authentication result is set at S39'. Further, in "o, the authentication result is set to r Αra and NG (failed). In S4l, the authentication result is displayed on the panel 5 5, and the 于田, 、田田通 k interface circuit 56 is directed to the individual. The computer 12 transmits the authentication result information. * 'In the case where the result is 0 ,, the unlocking drive circuit 57 is controlled, and after the lever is engaged, the process is returned to S31. The eighth embodiment shows the configuration of the present invention. Cross-sectional view. The fifth embodiment and the continuous shooting of the fifth embodiment of the living body authentication device can be obtained by using a concave mirror without the medium-side and left-right finger-side transmission light images.

2159-10070-PF 14 200946081 It is possible to cut off the cylindrical shape or use the ball or cut as an image. The inner surface shape of the shape of the concave mirror 95 or a part of the side surface of the conical shape is the portion of the inner surface of the elliptical ball of the ellipse. The concave mirror 95 is located below the finger 20 (the position of the saccade 1 (the position facing the face of the ventral sac), and the closer to the tip of the finger 20 is to be Λ / , the surface of the U 甶 mirror is farther away from the direction of the finger, the 1-port CCD The photographic element 82g has been placed in the front of the finger 5>n mi and is slightly downward. The direction of the concave mirror 95 can also be changed to the left and right in the 8th (8) figure.

The photographic element θ 82 is placed on the lower portion of the electrode 39 on the front side. In addition, in the case of using a concave mirror, although the shape of the captured image is distorted, it can also be used directly for recognizing the distortion of the image after the correction of the image. Alternatively, the concave mirror 95 may be deformed to have as little distortion as possible.苐6 embodiment Fig. 10 is a cross-sectional view showing the structure of a sixth embodiment of the biometric authentication device of the present invention. The sixth embodiment is an example of a finger position fixing structure in which the structures of the fifth embodiment are used in combination. (In the combination of the first diagram and the third embodiment) In the sixth embodiment, a dome-shaped structure having a recess 1 〇 2 into which the finger 20 to be recognized is inserted is included. Further, the notches 101 for placing the left and right fingers 11 and 111 are provided on both sides of the dome 1〇〇. = By placing the left and right fingers 110, 111 in the notch 101, it is prevented that s, and other days are rotated by 0. Because the finger 2 is facing down, the recognition accuracy is increased by two. However, since it is necessary to arrange the LED arrays 36, 37 or the mirrors 8A, 81 in the dome, it is necessary to have the left and right fingers 11. 111 is very open. Figure 11 is a cross-sectional view showing the structure of a modification of the sixth embodiment of the biometric authentication device of the present invention. The structure of Fig. 11 is to place the recesses m, 105 for placing the left 2159-10070-pf 15 200946081 right finger 110, (1) on the upper portion of the apparatus body 3A including the recess 106 into which the finger 20 to be identified is inserted. By placing the position of the left and right fingers obliquely above, as shown in the example of Fig. 10, it is not necessary to make the fingers wide open in the lateral direction, and the fingers can be arranged relatively easily. Moreover, the size of the apparatus body 30 can be made small. Although the embodiments are disclosed above, modifications such as the following are also contemplated in the present invention. In the embodiment, although an example in which a direct current power source is applied to an electrode and a voltage is detected and detected, it is also possible to connect the source of the alternating current signal with the electrode 39 on the front side instead of the mu flow, the female 55, and the freight forwarder. The AC signal, the bandpass filter, and the detector are used to detect the AC signal. As a detection method of the finger, although

Although an example of using the electrode detection is disclosed, for example, the opposite [ED array] can be turned on, and the transmitted light image can be read from (10), and the image can be analyzed to detect the insertion of the finger. When the LED array 3 is lit at the same time, because of the shadow

The case of a single lamp is less clear. Although the processing of FIG. 9 reveals an example in which each T separately captures images in three directions, and then combines all or part of the LED arrays 35, 36, and 37, and (Synthetic image in the three directions of the secondary photographing. In this case, it is not necessary to synthesize the image later. [Industrial Applicability] The biometric authentication device of the present invention can function to confirm the biometric authentication device of the present invention. Simple illustration

2159-10070-PF 16 200946081 Fig. 1 is a cross-sectional view showing the structure of a main part of the first embodiment of the biometric authentication device of the present invention. Fig. 2 is a block diagram showing the overall structure of a system for using the biometric authentication device 1 for the operation of the room management. Fig. 3 is a functional block diagram showing the electrical function of the biometric authentication device of the present invention. Fig. 4 is a flow chart showing the contents of the processing executed by the single crystal computer circuit 50. 5(a) and 5(b) are cross-sectional views showing the structure of a second embodiment of the biometric authentication device of the present invention. 6(a) and 6(b) are cross-sectional views showing the structure of a third embodiment of the biometric authentication device of the present invention. Fig. 7 is a cross-sectional view showing the structure of a fourth embodiment of the biometric authentication device of the present invention. 8(a) and 8(b) are cross-sectional views showing the structure of a fifth embodiment of the biometric authentication device of the present invention. Figure 9 is a flow chart showing another embodiment of the processing performed by the single crystal computer circuit 50. Fig. 1 is a cross-sectional view showing the structure of a sixth embodiment of the biometric authentication device of the present invention. Figure 11 is a cross-sectional view showing the structure of a modification of the sixth embodiment of the biometric authentication device of the present invention.

[Main component symbol description] 2159-10070-PF 17 200946081

20 fingers 21 fingers 30 baskets 31~ 33 CCD camera elements 35~ 37 infrared LED arrays 38 electrodes

2159-10070-PF 18

Claims (1)

200946081 X. Patent application scope: 1. A biometric authentication device, characterized in that it comprises a body, which has an internal space of an insertion finger; a plurality of light source means are disposed or embedded in a plurality of internal walls of the casing, And illuminating from the plurality of directions along the finger; the reflecting means is disposed or embedded in the inner wall surface of the casing facing the inner space of the insertion finger and facing a part of the light source means, and reflecting the transmitted light image; '(4) means' is the simultaneous transmission of the transmitted light image and the transmitted light image reflected by the reflection means; the photography control means detects the insertion of the finger, and controls the light source means and the photographing means to shoot; And comparing the image taken by the photographing means with the image registered in advance, and extracting the image with the best agreement rate; and the determining means is based on the coincidence rate of the image extracted by the comparing means And determine the feasibility of the certification. 2. The biometric authentication device of claim 1, wherein the reflecting means is a plane mirror or a crucible. 3. The biometric authentication device according to claim 1 or 2, wherein a recess or a notch for placing the left and right fingers of the finger used for the identification is placed on the upper surface of the housing, and the finger used for the insertion identification is used. The interior space is diagonally above. 4. A biometric authentication device, comprising: 2159-10070-PF 19 200946081 a housing "having an internal space with an insertion finger; a plurality of light source means, and a < a combat system S is placed or embedded in the housing a plurality of inner wall surfaces, and illuminating from a plurality of directions along the respective fingers; the surface reflecting hand is composed of a concave mirror, and the concave mirror is disposed or embedded in the inner space of the (4) insertion finger and opposite to the light source means The inner wall of the body is reflected by the light image; the photographic means is to capture the transmitted light image reflected by the concave reflecting means; ❹ the photography control means, the system, the 丨丨 丨丨 社 from the #, the detection of the #g Inserting and controlling the light source means and the photographing means to shoot; the image taken by the photographing means is compared with the opponent, and the image registered in advance is compared, and the image with the best rate is extracted And the determining means determines whether the authentication is possible based on the agreement rate of the images extracted by the comparison means. 5. The biometric authentication device of claim 4, wherein the concave mirror cuts off the shape of the portion of the cylindrical or conical side, and faces the face of the abdomen, and is disposed closer. The fingertip is closer to the position of the finger than the surface of the concave mirror. The photographing means is placed in front of the finger, slightly in the downward direction. 6. As indicated in the fourth or the scope of the patent application, the insertion of the upper surface of the housing used for the identification is placed above the identification. 5 items of biometric authentication are placed, and the inner space of the left and right fingers of the left and right fingers is set to 2159-10070-PF 20 200946081. 7. If the patent scope is 1, 2, 4 or 5, Wherein the photographic control means is a plurality of lamps, each of which captures a transmitted light image; and an image synthesizing means for composing a predetermined area and sticking to each other, and synthesizing an image of the biometric authentication light source means Passing through the light image 2159-10070-PF 21